{"data":{"id":"us/40-cfr-appendix-d-to-part-1037","jurisdiction":"us","citation":"40 CFR Appendix D to Part 1037","heading":"Appendix D to Part 1037—Heavy-Duty Grade Profile for Steady-State Test Cycles","body":"The following table identifies a grade profile for operating vehicles over the highway cruise cycles specified in subpart F of this part. Determine intermediate values by linear interpolation.\nDistance (m) Grade (%)\n0 0\n402 0\n804 0.5\n1206 0\n1210 0\n1222 −0.10\n1234 0\n1244 0\n1294 0.36\n1344 0\n1354 0\n1408 −0.28\n1504 −1.04\n1600 −0.28\n1654 0\n1666 0\n1792 0.39\n1860 0.66\n1936 1.15\n2098 2.44\n2260 1.15\n2336 0.66\n2404 0.39\n2530 0\n2548 0\n2732 −0.46\n2800 −0.69\n2880 −1.08\n2948 −1.53\n3100 −2.75\n3252 −1.53\n3320 −1.08\n3400 −0.69\n3468 −0.46\n3652 0\n3666 0\n3742 0.35\n3818 0.90\n3904 1.59\n3990 0.90\n4066 0.35\n4142 0\n4158 0\n4224 −0.10\n4496 −0.69\n4578 −0.97\n4664 −1.36\n4732 −1.78\n4916 −3.23\n5100 −1.78\n5168 −1.36\n5254 −0.97\n5336 −0.69\n5608 −0.10\n5674 0\n5724 0\n5808 0.10\n5900 0.17\n6122 0.38\n6314 0.58\n6454 0.77\n6628 1.09\n6714 1.29\n6838 1.66\n6964 2.14\n7040 2.57\n7112 3.00\n7164 3.27\n7202 3.69\n7292 5.01\n7382 3.69\n7420 3.27\n7472 3.00\n7544 2.57\n7620 2.14\n7746 1.66\n7870 1.29\n7956 1.09\n8130 0.77\n8270 0.58\n8462 0.38\n8684 0.17\n8776 0.10\n8860 0\n8904 0\n9010 −0.38\n9070 −0.69\n9254 −2.13\n9438 −0.69\n9498 −0.38\n9604 0\n9616 0\n9664 0.26\n9718 0.70\n9772 0.26\n9820 0\n9830 0\n9898 −0.34\n10024 −1.33\n10150 −0.34\n10218 0\n10228 0\n10316 0.37\n10370 0.70\n10514 1.85\n10658 0.70\n10712 0.37\n10800 0\n10812 0\n10900 −0.37\n10954 −0.7\n11098 −1.85\n11242 −0.70\n11296 −0.37\n11384 0\n11394 0\n11462 0.34\n11588 1.33\n11714 0.34\n11782 0\n11792 0\n11840 −0.26\n11894 −0.70\n11948 −0.26\n11996 0\n12008 0\n12114 0.38\n12174 0.69\n12358 2.13\n12542 0.69\n12602 0.38\n12708 0\n12752 0\n12836 −0.10\n12928 −0.17\n13150 −0.38\n13342 −0.58\n13482 −0.77\n13656 −1.09\n13742 −1.29\n13866 −1.66\n13992 −2.14\n14068 −2.57\n14140 −3.00\n14192 −3.27\n14230 −3.69\n14320 −5.01\n14410 −3.69\n14448 −3.27\n14500 −3.00\n14572 −2.57\n14648 −2.14\n14774 −1.66\n14898 −1.29\n14984 −1.09\n15158 −0.77\n15298 −0.58\n15490 −0.38\n15712 −0.17\n15804 −0.10\n15888 0\n15938 0\n16004 0.10\n16276 0.69\n16358 0.97\n16444 1.36\n16512 1.78\n16696 3.23\n16880 1.78\n16948 1.36\n17034 0.97\n17116 0.69\n17388 0.10\n17454 0\n17470 0\n17546 −0.35\n17622 −0.90\n17708 −1.59\n17794 −0.90\n17870 −0.35\n17946 0\n17960 0\n18144 0.46\n18212 0.69\n18292 1.08\n18360 1.53\n18512 2.75\n18664 1.53\n18732 1.08\n18812 0.69\n18880 0.46\n19064 0\n19082 0\n19208 −0.39\n19276 −0.66\n19352 −1.15\n19514 −2.44\n19676 −1.15\n19752 −0.66\n19820 −0.39\n19946 0\n19958 0\n20012 0.28\n20108 1.04\n20204 0.28\n20258 0\n20268 0\n20318 −0.36\n20368 0\n20378 0\n20390 0.10\n20402 0\n20406 0\n20808 −0.50\n21210 0\n21612 0","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1037—CONTROL OF EMISSIONS FROM NEW HEAVY-DUTY MOTOR VEHICLES"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"b3f59c7083b9345ae727ac1a7ae10d62c347e2241857a664c4f7f6e1e741dd9f","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-appendix-c-to-part-1037","next":"us/40-cfr-appendix-e-to-part-1037"},"notice":"GroundRules: Original legal text. Not legal advice."}